January 25, 2013, 9:38AM

The Portland police horse trainer test Murphy for a spot in the mounted patrol unit. The 6-year-old draft cross is eager to please and he's full of spunk. But he has a problem not uncommon among humans: He's too fat.

January 25, 2013, 11:24AM

Portland police horse trainer Jennifer Mack and officer Cassandra Wells test and train Murphy for a spot in the mounted patrol unit. The 6-year-old draft cross is friendly and as loyal as a dog. In his civilian life, he's been a bit of a couch potato but now it's time to get in shape for duty.

February 07, 2013, 2:31PM

Murphy, a 6-year-old draft cross, goes more tests in his trial to become Portland's next police horse. He learns to work with a mounted horse and get used to being touched by a duster. He passes with flying colors.

February 15, 2013, 11:46AM

Murphy, a 6-year-old draft cross vying for an empty slot on Portland's mounted patrol, confronts a baby stroller for the first time and a child's plastic swimming pool. He tromps on the latter and nuzzles the former, passing yet another trial in his training. Next up: a crucial vet exam.